19978348

素因数分解:

$2^2\times {\mathrm{13}}^1\times {\mathrm{19}}^1\times {\mathrm{73}}^1\times {\mathrm{277}}^1$

素因数の和:386

約数の個数: 48

約数和(自身を含む): 40321120

約数和(自身を除く): 20342772

約数列:

[1, 2, 4, 13, 19, 26, 38, 52, 73, 76, 146, 247, 277, 292, 494, 554, 949, 988, 1108, 1387, 1898, 2774, 3601, 3796, 5263, 5548, 7202, 10526, 14404, 18031, 20221, 21052, 36062, 40442, 68419, 72124, 80884, 136838, 262873, 273676, 384199, 525746, 768398, 1051492, 1536796, 4994587, 9989174, 19978348]

約数ペア:

[(1, 19978348), (2, 9989174), (4, 4994587), (13, 1536796), (19, 1051492), (26, 768398), (38, 525746), (52, 384199), (73, 273676), (76, 262873), (146, 136838), (247, 80884), (277, 72124), (292, 68419), (494, 40442), (554, 36062), (949, 21052), (988, 20221), (1108, 18031), (1387, 14404), (1898, 10526), (2774, 7202), (3601, 5548), (3796, 5263)]